* {
    margin: 0;
    padding: 0;
}

ul {
    list-style: none;
}

header {
    height: 80px;
    position: sticky;
    /* 导航栏固定 */
    position: -webkit-sticky;
    top: 0px;
    z-index: 10;
}

.type_page {
    width: 1170px;
    height: 80px;
    margin: 0px auto;
}

.header_logo {
    width: 60px;
    height: 60px;
    float: left;
    border: 1px solid #ccc;
    margin: 10px;
}

.header_logo img,
.header_right_nav img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.header_left_nav {
    width: 400px;
    height: 60px;
    float: left;
    margin: 10px;
}

.header_left_nav a {
    text-decoration: none;
    color: #000;
}

.header_left_nav ul li {
    width: 60px;
    height: 60px;
    text-align: center;
    line-height: 60px;
    font-size: 18px;
    font-weight: 500;
    margin-left: 20px;
    float: left;
}

.header_left_nav ul li a {
    width: 60px;
    height: 60px;
    display: inline-block;
}

.header_left_nav ul li a:hover {
    cursor: pointer;
    background-color: #ccc;
    color: black;
    text-decoration: none;
}

.header_right_nav {
    width: 600px;
    height: 60px;
    float: right;
    margin: 10px;
}

.header_right_nav ul {
    width: 200px;
    height: 60px;
    float: right;
}

.header_right_nav ul li {
    width: 40px;
    height: 40px;
    margin: 10px;
    float: left;
}

.input_search {
    margin-left: 200px;
    height: 40px;
    width: 170px;
    margin-top: 10px;
    border: 1px solid #ccc;
    border-radius: 3px;
    font-size: 20px;
    background-image: url(../images/search.png);
    background-size: 30px 30px;
    background-repeat: no-repeat;
    background-position: right;
}